EP4044885B1 - Kaffeemühle mit vorrichtung zur filterhalterung oder filterdetektion und verfahren zur detektion eines filterhalters oder filters - Google Patents

Kaffeemühle mit vorrichtung zur filterhalterung oder filterdetektion und verfahren zur detektion eines filterhalters oder filters Download PDF

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Publication number
EP4044885B1
EP4044885B1 EP20807497.1A EP20807497A EP4044885B1 EP 4044885 B1 EP4044885 B1 EP 4044885B1 EP 20807497 A EP20807497 A EP 20807497A EP 4044885 B1 EP4044885 B1 EP 4044885B1
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EP
European Patent Office
Prior art keywords
filter
machine
support
filter holder
coffee
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Application number
EP20807497.1A
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English (en)
French (fr)
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EP4044885C0 (de
EP4044885A1 (de
Inventor
Andrea DIONISIO
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Marzocco SRL
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Marzocco SRL
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J42/00—Coffee mills; Spice mills
    • A47J42/38—Parts or details
    • A47J42/40—Parts or details relating to discharge, receiving container or the like; Bag clamps, e.g. with means for actuating electric switches
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J42/00—Coffee mills; Spice mills
    • A47J42/38—Parts or details
    • A47J42/56—Safety devices
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23F—COFFEE; TEA; THEIR SUBSTITUTES; MANUFACTURE, PREPARATION, OR INFUSION THEREOF
    • A23F5/00—Coffee; Coffee substitutes; Preparations thereof
    • A23F5/08—Methods of grinding coffee
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00—Apparatus for making beverages
    • A47J31/06—Filters or strainers for coffee or tea makers ; Holders therefor
    • A47J31/0657—Filters or strainers for coffee or tea makers ; Holders therefor for brewing coffee under pressure, e.g. for espresso machines
    • A47J31/0663—Filters or strainers for coffee or tea makers ; Holders therefor for brewing coffee under pressure, e.g. for espresso machines to be used with loose coffee
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J42/00—Coffee mills; Spice mills
    • A47J42/38—Parts or details
    • A47J42/40—Parts or details relating to discharge, receiving container or the like; Bag clamps, e.g. with means for actuating electric switches
    • A47J42/42—Drawers for receiving ground material
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J42/00—Coffee mills; Spice mills
    • A47J42/38—Parts or details
    • A47J42/44—Automatic starting or stopping devices; Warning devices
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J42/00—Coffee mills; Spice mills
    • A47J42/38—Parts or details
    • A47J42/46—Driving mechanisms; Coupling to drives

Definitions

  • the present invention relates to the field of espresso coffee making machines and to machines for grinding coffee grains.
  • a coffee grain grinding machine may be a separate machine or may be integrated into a coffee beverage making machine.
  • Such a machine for grinding coffee grains is also known simply as “coffee grinder machine”, “coffee grinder” or “grinder”.
  • the present invention relates to a device for detecting when a filter and/or a filter holder is present in a predetermined position of a coffee grinder machine or an espresso coffee making machine.
  • a certain amount of ground coffee is used for the preparation of an espresso coffee.
  • the dose of ground coffee is loaded into a filter, which is typically cup-shaped, open at the top and with a micro-perforated bottom.
  • the coffee dose is pressed into the filter to form a powdered coffee puck.
  • the filter is in turn supported by a filter holder configured to removably engage a dispensing group of an espresso coffee machine.
  • the espresso coffee is obtained by passing hot water under pressure through the powdered coffee puck.
  • the coffee powder is obtained by a coffee grinder machine.
  • a coffee grinder machine In a known coffee grinder machine, the coffee grains are ground by passing them through grinding members. Grinding members of the flat, conical or cylindrical type are known.
  • the grinding members of a coffee grinding machine comprise a fixed member and a member which rotates with respect to the fixed member. For example, in a coffee grinder with conical grinders, one grinder remains fixed, namely stationary, while the other is rotated by a motor.
  • the filter holder Downstream of the grinding means, the filter holder is arranged so that the ground coffee collects in the filter retained by the filter holder.
  • Supports for the filter holder are known. These supports constitute a support for the filter holder during the coffee grinding and the loading of the ground coffee into the filter.
  • Some coffee grinding machines are able to detect the presence of the filter holder when resting on the support.
  • coffee grinding machines are known in which the detection takes place using a mechanical microswitch, an inductive sensor or a device corresponding to the weight (or mass) of the filter holder, for example a device comprising a load cell or the like.
  • Detection of the presence of the filter holder in place may be desirable or necessary for a plurality of reasons.
  • detection of the filter holder can be used to start grinding the coffee grains automatically, without pressing a start key in the coffee grinder.
  • the detection of the filter holder can be used to prevent the inadvertent start of the grinding if the key is pressed without the filter holder resting.
  • the detection of the filter holder can be used to stop the grinding automatically as soon as the filter holder is removed.
  • AU 2012 268 779 B2 discloses a dispensing appliance for dispensing coffee grinds into a filter assembly comprising: a body; a cradle for receiving the filter assembly, wherein the cradle is moveable relative to the body between a first and second position; a dispensing assembly for dispensing coffee grinds to the filter assembly, wherein the dispensing assembly is operable to dispense coffee grinds by moving the cradle to the second position.
  • EP 2 892 403 A1 discloses a super-automatic coffee maker for preparation of espresso coffee.
  • EP 2 314 188 A1 discloses an apparatus and a method for refilling the filter-holders of an espresso coffee machine with selected doses of ground coffee to order.
  • the Applicant has carefully observed the known devices for detecting the filter holder in coffee grinder machines or the like.
  • a filter holder detection system of the above type has the intrinsic limit of using a delicate component which is at high risk of breakage.
  • the microswitches, the inductive sensors or the load cells of a sensing system based on the weight of the filter holder are delicate components.
  • the environment is dirty with coffee powder.
  • a coffee grinding machine is frequently subjected to washing with water or detergents by personnel who are not very respectful of the machine and in any case forced to work quickly.
  • the bartender operates at great speed in confined spaces and often collides, unintentionally and also abruptly, with the support and/or the sensor.
  • the inductive sensor is advantageous in that it is contact-free but has a rather reduced reading range. Moreover, according to the Applicant, the steel filter holders are detected worse than the brass filter holders. In any case, the inductive sensor is sensitive to dirt and is also expensive.
  • grinding may not occur or may not stop at the set time or start when not necessary. All of these situations are a hindrance to the work of the bartender and therefore affect the work of the bartender. Furthermore, in the event that the dose does not stop at the desired time or in the case where the grinding starts when not desired, the ground coffee would be wasted.
  • the Applicant has therefore set itself the objective of providing a reliable and robust system for detecting the presence of a filter or a filter holder in a coffee grinding machine.
  • the device of the invention can also be used in a machine other than a coffee grinding machine.
  • it can be used in a machine for weighing the coffee dose (contained in the filter) or in a machine for pressing the ground coffee.
  • the expression "machine” or “coffee machine” (or similar expressions) will also mean an espresso coffee machine, a coffee weighing machine or a coffee pressing machine.
  • the above object can be obtained by providing a normally open switch comprising a first electrical contact and a second electrical contact, wherein said first electrical contact and said second electrical contact are configured to support the filter and/or the filter holder so as to close the switch by means of an electrical contact between said contacts and said filter and/or filter holder.
  • a coffee grinding machine comprising:
  • the first half-support and the second half-support are separated by a slot and comprise a bight for the body of the filter holder.
  • the first half-support and the second half-support define a support plane.
  • the first half-support and the second half-support are configured to engage the filter holder at the fins projecting from the body of the filter holder.
  • the first half-support and the second half-support are connected to a board by means of respective cables.
  • the machine also comprises a further handle support for supporting the handle of the filter holder.
  • the machine further comprises hooks cooperating with the half-supports to hold the filter and/or the filter holder in a predetermined position.
  • the hooks are substantially inverted L-shaped.
  • the hooks are at least partially of an electrically conductive material.
  • the present invention provides a method for detecting the presence of a filter and/or a filter holder when it is in a set position in a coffee grinding machine or in an espresso coffee making machine or in a machine for weighing a dose of coffee or in a machine for pressing a dose of coffee into a filter holder, comprising: providing a filter or filter-holder detection device comprising a normally open switch comprising a first half-support for the filter or filter-holder and a second half-support for the filter or filter-holder, and closing the switch by creating an electrical contact between said filter and/or filter holder, said first support and said second support.
  • the motor when the switch is open, the motor is not powered.
  • a time threshold is provided between the time in which the circuit is closed by the filter and/or the filter holder and the time in which the functionality of the coffee grinder is inhibited.
  • a coffee grinding machine 1 is shown with a device 10 for detecting the presence of the filter holder 20 in a correct position.
  • the coffee grinding machine 1 comprises a machine body 2 which encloses the main components, including a motor and grinding members, not shown.
  • a hopper 5 for containing coffee beans to be grinded is mounted on the upper part.
  • the filter holder 20 In the lower part there is a zone 3 for the filter holder 20. During grinding, the filter holder 20 must be in a correct position so that the ground coffee collects in the filter 23.
  • the device 10 for detecting the filter holder comprises a normally open switch which is closed by means of an electrical connection between the filter holder 20 and two electrically conductive contacts 12A, 12B.
  • the two electrically conductive contacts 12A, 12B are configured to support the filter holder 20.
  • the two electrically conductive contacts 12A, 12B support the filter holder 20 at the body 22 of the filter holder 20 which is made of at least partially metallic material, such as steel, aluminum, brass or alloys thereof.
  • the two electrically conductive contacts 12A, 12B are configured to support the body 22 of the filter holder.
  • the two electrically conductive contacts 12A, 12B are configured to support the body 22 of the filter holder at the fins 221 which serve to lock the filter holder to a dispensing assembly of an espresso coffee machine.
  • the filter holder detecting device 10 comprises a support 12 in turn comprising two half supports 12A, 12B.
  • Each of the half-supports 12A, 12B is at least partially made of an electrically conductive material and is electrically insulated from the other half-support.
  • the two half-supports 12A, 12B are separated by an empty space 18 and form a support plane with a substantially semicircular front bight 18.
  • the supports 12A, 12B could be shaped differently without departing from the scope of the present invention.
  • Each half-support 12A, 12B is electrically connected to a control unit C, for example by means of an electric wire 14A, 14B.
  • the corresponding electrical circuit In the absence of the filter holder, the corresponding electrical circuit is open and this inhibits at least one functionality of the coffee grinder 1. For example, it inhibits the feeding of a motor M which, by acting on one or more of the grinding members, performs the grinding of the coffee grains. Therefore, in the absence of the filter holder in position, the motor M is not supplied and cannot operate.
  • the filter holder 20 When the filter holder 20 is in a correct position, since its body 22 is at least partially made of metal, it closes the circuit and makes possible the otherwise prevented functionality. For example, it makes it possible to operate the motor M by means of a start key or even possibly without pressing any key. In the latter case, the motor M is configured to start immediately upon contact between the (metallic) body of the filter holder and the two half-supports.
  • Fig. 4 schematically shows the circuit of the switch I closed by means of the body 22 of the filter holder 20.
  • Fig. 4 also shows the control unit C and the motor M which drives one or more of the grinding members.
  • half-supports 12A, 12B of the device of the invention may have a shape different from that shown in Figures 1-3 .
  • each could have a cylindrical bar shape, as shown in Figures 4 , 5.1 and 5.2 .
  • Fig. 5.1 schematically shows a filter holder 20 before coming into contact with the two half-supports 12A, 12B and Fig. 5.2 schematically shows a filter holder 20 in contact with the two half-supports 12A, 12B.
  • a further support 19 may also be provided to support the filter holder 20 in correspondence of at least another point.
  • the further support could be a Y-shaped handle support 21 for receiving the handle 21 of a filter holder 20.
  • the height of the further support 19 is adjustable to accommodate handles of different shapes and/or diameters. Height adjustment may be via a screw system.
  • a time threshold is provided between the time in which the circuit is closed by the filter holder and the time in which, for example, the motor of a coffee grinding machine starts and possibly stops. This is to avoid the situation in which the bartender rests the filter holder on the support but immediately after he inadvertently lifts it from the support.
  • each half-holder 12A and 12B comprises holding hooks 15A and 15B for holding a filter holder 20 and/or a filter 23.
  • the filter 23 can be held by the hooks 15A and 15B when it is housed in the body 22 of the filter holder 20 or, alternatively, it can be held directly ( Figures 8A and 8B ).
  • Each hook 15A and 15B is, for example, shaped like an inverted L and the two hooks face each other to form a sort of bridge, interrupted centrally.
  • the half-supports 12A and 12B have an angular profile.
  • Each hook 15A and 15B is integral with a half-support or is fixed to a half-support.
  • the fixing can be done, for example, by welding, with screws or other known system.
  • each hook 15A and 15B comprises a thinner lower leg 16A, 16B which engages a hole in the half-support 12A and 12B.
  • the half-support and the hook 15A and 15B are locked together with a screw with a head that can be rotated by two fingers of a hand. In this way, the two hooks can be easily assembled and disassembled.
  • the half-supports 12A and 12B and the hooks are, at least partially, in an electrically conductive material.
  • the electrical circuit described in relation to the first embodiment is closed when it is present
  • the circuit is closed by the filter holder and/or by the filter.
  • This embodiment results in several advantages. First, it is possible to use a filter holder made of a non-metallic material because the electrical contact is ensured by the filter. Secondly, it is possible not to use a filter holder at all. Thirdly, the filter holder and/or filter is prevented from tipping over. Fourthly, since the filter holder and/or the filter are not resting in correspondence with other support points, it is easier to weigh them.

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Polymers & Plastics (AREA)
  • Apparatus For Making Beverages (AREA)
  • Crushing And Grinding (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Sampling And Sample Adjustment (AREA)

Claims (15)

  1. Kaffeemahlmaschine (1) mit:
    einem Maschinenkörper (2) mit einem Motor und Mahlelementen zum Mahlen von Kaffeebohnen; und einer Vorrichtung (10) zum Erkennen des Vorhandenseins eines Filters (23) und/oder eines Filterhalters (20) in einer bestimmten Position, die zur Aufnahme von gemahlenem Kaffee geeignet ist,
    wobei die Erfassungsvorrichtung (10) einen normalerweise offenen Schalter (I) aufweist, der eine erste Halbstütze (12A) für das Filter (23) und/oder den Filterhalter (20) und eine zweite Halbstütze (12B) für das Filter und/oder den Filterhalter (20) aufweist,
    dadurch gekennzeichnet,
    dass der Schalter (I) ausgestaltet ist, um sich zu schließen, wenn das Filter und/oder der Filterhalter (20) in elektrischem Kontakt mit der ersten Halbstütze (12A) und mit der zweiten Halbstütze (12B) steht.
  2. Maschine (1) nach Anspruch 1, wobei, wenn der Schalter (I) offen ist, mindestens eine Funktion der Kaffeemahlmaschine blockiert ist.
  3. Maschine (1) nach Anspruch 2, wobei der Motor nicht angetrieben ist, wenn der Schalter (I) offen ist.
  4. Maschine (1) nach einem der vorhergehenden Ansprüche, wobei die erste Halbstütze (12A) und die zweite Halbstütze (12B) durch einen Schlitz (18) getrennt sind und eine Einbuchtung (16) für den Körper (21) des Filterhalters (20) aufweisen.
  5. Maschine (1) nach Anspruch 4, wobei die erste Halbstütze (12A) und die zweite Halbstütze (12B) eine Stützebene definieren.
  6. Maschine (1) nach einem der Ansprüche 1 bis 3, wobei die erste Halbstütze (12A) und die zweite Halbstütze (12B) ausgestaltet sind, um mit dem Filterhalter (20) in Übereinstimmung mit den Rippen (221), die aus dem Körper (22) des Filterhalters (20) herausragen, in Eingriff zu kommen.
  7. Maschine (1) nach einem der vorhergehenden Ansprüche, wobei die erste Halbstütze (12A) und die zweite Halbstütze (12B) über entsprechende Kabel (14A, 14B) mit einer Platine (C) verbunden sind.
  8. Maschine (1) nach einem der vorhergehenden Ansprüche, die ferner eine weitere Griffstütze (19) zum Stützen des Griffs (21) des Filterhalters (20) aufweist.
  9. Maschine (1) nach einem der vorhergehenden Ansprüche, die ferner Haken (15A, 15B) aufweist, die mit den Halbstützen (12A, 12B) zusammenwirken, um das Filter (23) und/oder den Filterhalter (20) in einer vorgegebenen Position zu halten.
  10. Maschine nach Anspruch 9, wobei die Haken (15A, 15B) im Wesentlichen umgekehrt L-förmig sind.
  11. Maschine nach Anspruch 9 oder 10, bei der die Haken (15A, 15B) zumindest teilweise aus einem elektrisch leitenden Material bestehen.
  12. Verfahren zum Erfassen des Vorhandenseins eines Filters (23) oder eines Filterhalters (20), wenn sich dieser in einer bestimmten Position in einer Kaffeemahlmaschine oder in einer Maschine zur Zubereitung von Espresso-Kaffee oder in einer Maschine zum Wiegen einer Kaffeedosierung oder in einer Maschine zum Pressen einer Dosierung gemahlenen Kaffees in einem Filterhalter befindet, wobei es aufweist: Bereitstellen einer Vorrichtung (10) zum Erfassen eines Filters (23) oder eines Filterhalters (20) mit einem normalerweise offenen Schalter (I), der eine erste Halbstütze (12A) für das Filter (23) und/oder den Filterhalter (20) und eine zweite Halbstütze (12B) für das Filter (23) und/oder den Filterhalter (20) aufweist, gekennzeichnet durch Schließen des Schalters (I), um einen elektrischen Kontakt zwischen dem Filter (23) und/oder dem Filterhalter (20), der ersten Halbstütze (12A) und der zweiten Halbstütze (12B) zu erzeugen.
  13. Verfahren nach Anspruch 12, wobei, wenn der Schalter (I) geöffnet ist, mindestens eine Funktion der Kaffeemahlmaschine blockiert ist.
  14. Verfahren nach Anspruch 13, bei dem der Motor nicht angetrieben wird, wenn der Schalter (I) geöffnet ist.
  15. Verfahren nach Anspruch 13 oder 14, bei dem eine Zeitschwelle vorgesehen ist zwischen der Zeit, in der der Stromkreis durch das Filter und/oder den Filterhalter geschlossen ist, und der Zeit, in der die Funktion der Kaffeemahlmaschine blockiert ist.
EP20807497.1A 2019-10-18 2020-10-19 Kaffeemühle mit vorrichtung zur filterhalterung oder filterdetektion und verfahren zur detektion eines filterhalters oder filters Active EP4044885B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102019000019349A IT201900019349A1 (it) 2019-10-18 2019-10-18 Macchina macina caffè con dispositivo di rilevamento portafiltro e metodo per rilevare un portafiltro
PCT/IB2020/059819 WO2021074908A1 (en) 2019-10-18 2020-10-19 Coffee grinder with device for filter holder or filter detection and method for detecting a filter holder or filter

Publications (3)

Publication Number Publication Date
EP4044885A1 EP4044885A1 (de) 2022-08-24
EP4044885C0 EP4044885C0 (de) 2023-08-02
EP4044885B1 true EP4044885B1 (de) 2023-08-02

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EP20807497.1A Active EP4044885B1 (de) 2019-10-18 2020-10-19 Kaffeemühle mit vorrichtung zur filterhalterung oder filterdetektion und verfahren zur detektion eines filterhalters oder filters

Country Status (13)

Country Link
US (1) US20230284834A1 (de)
EP (1) EP4044885B1 (de)
JP (1) JP7550852B2 (de)
KR (1) KR20220092876A (de)
CN (1) CN114786549B (de)
AU (1) AU2020366726B2 (de)
CA (1) CA3156324A1 (de)
ES (1) ES2961243T3 (de)
HU (1) HUE063419T2 (de)
IT (1) IT201900019349A1 (de)
PL (1) PL4044885T3 (de)
WO (1) WO2021074908A1 (de)
ZA (1) ZA202203723B (de)

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ZA202203723B (en) 2024-10-30
CN114786549A (zh) 2022-07-22
JP2022552388A (ja) 2022-12-15
EP4044885C0 (de) 2023-08-02
PL4044885T3 (pl) 2024-02-05
ES2961243T3 (es) 2024-03-11
IT201900019349A1 (it) 2021-04-18
AU2020366726B2 (en) 2025-07-31
US20230284834A1 (en) 2023-09-14
CA3156324A1 (en) 2021-04-22
HUE063419T2 (hu) 2024-01-28
EP4044885A1 (de) 2022-08-24
CN114786549B (zh) 2025-09-19
JP7550852B2 (ja) 2024-09-13
AU2020366726A1 (en) 2022-04-21
WO2021074908A1 (en) 2021-04-22
KR20220092876A (ko) 2022-07-04

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